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I am new to snort rules and need a rule that will alert any email from a specific user.. For example:
alert tcp any any -> any 25 (msg:"Target Email Detected"; content:"email@thatemail.com"; fast_pattern:only; nocase; classtype: Target Email Detected ;sid:12345 ;)
This rule as of now will sniff it if it is in the content, but mail from the email above is not alerted.
I created the custom classtype and it works ok, I feel its something with it not capturing mail headers right or something, would a pcre be needed? – ThatGuy – 2011-10-18T15:30:14.250